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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 500 · 40 questions
TalentJR

How to do it in your head (Double, double, double): × 2: double once. × 4: double, then double again. × 8: double three times.

NameDateTime takenScore ___ / 40
  1. 1.63 × 4 =
  2. 2.41 × 4 =
  3. 3.23 × 4 =
  4. 4.52 × 4 =
  5. 5.33 × 8 =
  6. 6.42 × 4 =
  7. 7.30 × 8 =
  8. 8.14 × 8 =
  9. 9.37 × 8 =
  10. 10.65 × 4 =
  11. 11.32 × 4 =
  12. 12.35 × 4 =
  13. 13.51 × 4 =
  14. 14.38 × 8 =
  15. 15.21 × 8 =
  16. 16.18 × 8 =
  17. 17.27 × 8 =
  18. 18.68 × 4 =
  19. 19.75 × 4 =
  20. 20.29 × 4 =
  21. 21.28 × 4 =
  22. 22.23 × 8 =
  23. 23.34 × 4 =
  24. 24.44 × 4 =
  25. 25.35 × 8 =
  26. 26.32 × 8 =
  27. 27.15 × 8 =
  28. 28.18 × 4 =
  29. 29.16 × 4 =
  30. 30.26 × 4 =
  31. 31.24 × 8 =
  32. 32.21 × 4 =
  33. 33.22 × 8 =
  34. 34.17 × 8 =
  35. 35.57 × 4 =
  36. 36.61 × 4 =
  37. 37.22 × 4 =
  38. 38.13 × 4 =
  39. 39.33 × 4 =
  40. 40.20 × 8 =

Answer key

  1. 252
  2. 164
  3. 92
  4. 208
  5. 264
  6. 168
  7. 240
  8. 112
  9. 296
  10. 260
  11. 128
  12. 140
  13. 204
  14. 304
  15. 168
  16. 144
  17. 216
  18. 272
  19. 300
  20. 116
  21. 112
  22. 184
  23. 136
  24. 176
  25. 280
  26. 256
  27. 120
  28. 72
  29. 64
  30. 104
  31. 192
  32. 84
  33. 176
  34. 136
  35. 228
  36. 244
  37. 88
  38. 52
  39. 132
  40. 160

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